由于长期农业灌溉,在甘肃黑方台地区的黄土塬边发生了严重的滑坡灾害。针对以上问题,本文选取黑方台黄土作为研究对象。首先,测试了该地区黄土的基本物理性质,在此基础上,重点研究了该地区黄土的水力特性。一方面,通过在现场开展双环注水试验,测得了不同位置的渗透系数,另一方面,利用原状土样,开展了增减湿循环条件下的土水特征曲线测试。将实验室测得的原状黄土土水特征曲线离散点,利用MATLAB实现了参数拟合。结合黄土的微观结构特性,对黄土的渗透系数和土水特征进行了进一步讨论。结果表明,虽然该黄土具有粉土的颗粒级配,但是其结构特性使其表现出较高的渗透系数和较低的进气值。 Due to long-term agricultural irrigation, a serious landslide disaster occurred on the Loess Plateau in Gansu Province. In view of the above problems, this article selects Black Fangtai loess as the research object. First of all, the basic physical properties of loess in this area were tested. On this basis, the hydraulic characteristics of loess in this area were mainly studied. On the one hand, through the double-ring water injection test in the field, the permeability coefficient at different positions was measured. On the other hand, the soil-water characteristic curves under different wetting and drying cycles were tested with the undisturbed soil samples. Based on the discrete points of undisturbed loess soil-water characteristic curves measured by the laboratory, the parameters were fitted by MATLAB. Combined with the microstructure characteristics of loess, the loess permeability coefficient and soil water characteristics are further discussed. The results show that although the loess has silt grading, its structural characteristics make it show higher permeability coefficient and lower inlet value.